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@einen tates @anni Letters Patent No. 79,405, dated June 30, 1868.

IMPROVEMENT IN BALANCING POLISIEIIN(ir-WHEELS.`

tite tlgehule retract tu in these. Estima ntent mit mating met nf tigetame.-

`TO ALL WHOM IT MAY CONCERN:

Be it known that I, ALFRED W. STEPHENSON, of Kensington, county o fHartford, and State of Connecticut, have invented certain new and usefulImprovements inthe Mode of Balancing Polishing-Wheels; and to enableothers skilled iu the art to make and use the same, I will proceed todescribe by referring to the drawings, in which the same lettersindicate like parts in each of the figures.

The'nature of this invention will be understood from the specificationsand drawings.

The object desired to be obtained thereby is to avoid the common andirksome mode of balancing wheels, by boring Yinto various points oftheWheel, and inserting metal or screws, which occupies a great amount oftime and patience, together with a great uncertainty as to how long theywill remain balanced.

In the accompanying drawings- Figure 1 isV a sectional vien' of theflange, spindle-hub, adjustable balancc-platc, slitted plate, andfastening-nut.

Figure 2 is a face view of the ilange, with its cover or slitted plateremoved.

Figure 3 is the slitted plate or fastening-nut detached from the Ilangc.

a is a spindle-hub, by which the fla-ngc and its wheels are secured tothedriving-spindle.

is a Hangs formed on said hub. v

b are screw-holes, through which screws are turned into the wheels, tosecure' said wheels t'o the hub.

c is a rim, formed on the outer edge of said I iange.

vfl is the end of thel hub a, which. extends through the Ilange bsuliicient to receive thc adjustable balanceplate, cover, and`fastening-nut, on the outer end of which is a screw, e, to sccurethenut-f.

L is a cap or cover, which {its closely inside the rim c, and over theend of the-hub d.

This cover is provided with slits or parallel openings, 7L, eachequidistant from and cach side ofthe hub a.

z'is an adjustable balance-plate, having an elongated slit or opening,t, which is placed over the hub a,

into the depressions in the flange b formed by the rim'c. This plateis-'provided with regulating or adjustingpins, 7s, which protrudethrough the slits or openings in the plate t, by means of which the pins7c, the balancingplate 2', can he adjusted in such.a manner as toperfectly balance the wheel in a very little time, and by the pressureof the plate on cap 7L, occasioned by the action of the nut f, the platet' will be firmly held in a fixed position, and the wheel easily andquickly balanced whenever occasion requires.

I believe I have thus shown the nature, construction, and advantage ofthis invention, so as to enable others skilled in the art to make andusc the same.

What I claim, therefore, and desire to secure by Letters Patent, is Theadjustable balance-plate t', or its mechanical equivalent, incombination with the cap h and flange-hub b, and nut d, constructed andoperating substantially as and for the purpose described.

A. WS STEPHENSON. [L1 s] Witnesses:

N. C. WILDER, J. W. BLISS.

